Screening tools in child mental health and research play a significant role in assessing what kind of psychosocial issues and strengths can be recognized and how serious these issues are. One of the most commonly used screening tools is the “Strengths and Difficulties Questionnaire”. The SDQ comprises of 25 items separated equally over five levels which measure emotional symptoms, behavioural issues, hyperactivity-inattention, peer problems and prosocial behaviour (Stone et al., 2015).
The SDq has usually been regarded as an instrument of great psychometric characteristics and constructs validity has been endorsed in the literature (Björnsdotter, Enebraink, & Ghaderi, 2013). For example, the results produced by SDQ are extremely associated with the Child Behavior Checklist (CBCL) and when compared both with a semi-structured interview (Björnsdotter, Enebrink & Ghaderi 2013), it is easier to detect inattentiveness and hyperactivity in many ways than the CBCL does.
In this research, the analysis of exploratory factor information (EFA) is used. EFA also helps to reduce the data to an extremely small number of summary variables and also helps to explore the theoretical structure behind the phenomena. It also serves to identify the relationship structure between the variable and the respondent (“Confirmatory Factor Analysis – Statistics Solutions”, 2016). In the world, there is an increasing number of children and adolescents, who are identified to suffer from various mental health issues, which will have a greater impact of the lives of the children and this need to be addressed soon, where the parents and teachers must be made aware of such children’s emotional functioning. Because, this increases these children’s strength and eases them to handle their difficulties (“Children and young people”, 2018). These children, however, need instant assistance (Tracy, 2016). Du, Kour & Coghill study show that SDQ can be used in communities outside of Great Britain quite reliably and validly (Du, Kou & Coghill, 2008). However, there are many issues obviously showing whether or not SDQ has reliability and validity in different samples. According to (Hawes & Dadds, 2004), the Strengths and Difficulties Questionnaire (SQD) examined Australian psychometric characteristics. Behavioural and emotional problems in children and youth are studied. The inner consistency, stability and external validity of the SDQ parent-report was evaluated with the assistance of a big collective survey (n= 1359) of young Australian kids aged between 4 and 9 years. It contributed to the production of normative data and cut-offs. Their inner reliability was even moderate to strong. Moreover, in the connection between SDQ subscales, teacher reviews and diagnostic interviews, it showed that the connection of these scales is adequately valid. The overall SDQ problems ratings were related to concurrent therapy and a 12-month stability rate. This research, therefore, demonstrates that SDQ demonstrates the psychometric characteristics of Australian data. Even in the study of (Koskelainen, Sourander & Kaljonen, 2000), the psychometric qualities were satisfactory and the mental and behavioural problem in Greek teenagers was deemed to be adequate. Where the objective was to assess the reliability and validity of the Greek version of the SDQ. Teenagers aged from 11 to 17 years had 1194 Greek samples taken into consideration. To determine the inner consistency reliability the Cronbach α coefficient calculation was used. Varimax Orthogonal Transformation has screened the factor structure of the questionnaire. Next, it examined the validity, and its association with demographic variables, with the inquiry of the SDQ correlation with the KIDSCREEN questionnaire. With a Cronbach α above 0,70 for all SDQ scales except for behaviour and peer issues, the inner reliability was acceptable. Correlations between ratings were between 0.33 and 0.45. The stability test-retest was nice (ICCs > 0.60). The SDQ-KIDSCREEN questionnaire correlation coefficients are important. Small impact sizes (d>0.5) have been determined for all mean SDQ scales. The findings demonstrated psychometric satisfaction and were thought to be appropriate for an evaluation of Greek teenage emotional and behavioural issues. Child and adolescent diseases are an increasing problem for government health. The SDQ can be used readily by children and young people because it enables them to understand their views (“Strengths and Difficulties Questionnaire”, 2017). Therefore, this study is the most commonly used technique for children’s mental health and SDQ.
The present reliability and validity of the scale of Nigerians are explored with the assistance of the SDQ. In addition, as SDQ facilitates data translation measures in different languages. The dual-sided version of SDQ is finished when used in social work. This involves a component of psychological attributes and an impact add-on.
The SDQ examines 25 attributes, divided between 5 scales (“Strengths and Difficulties Questionnaire (SDQ)”, 2018)
The management of the psychological attributes differs depending on the age or demographics of children or young people tested. The self-registration SDQ version is appropriate for young individuals between 11 and 16 but depends on the level of knowledge and literacy of the young person.
The effect supplement examines the nature of parents and teachers ‘ issues. The gathered information involves burdens on others, social disability, chronicity and distress in connection with a reported issue.
Aim: More than 50 per cent of the population is kids and teenagers in most low-and middle-income nations. There are very few mental health professionals in children and adolescents who address this population’s mental health requirements. Those few overloaded professionals should, therefore, be provided with screening tools that are simple to use and require little time to finish. This research is therefore intended to determine the psychometric characteristics of the Strengths and Difficulties Questionnaire (SDQ) for young people attending Nigerian secondary schools.
Data: SDQs were conducted among a total of 7019 participants from Nigeria whose age ranges between 4 to 17 years. The participants were the children and adolescents from Nigeria, where the investigation was conducted to assess the prevalence of psychological disorders.
In particular, each SDQ version includes 25 sub-scales of five elements, namely scale of emotional signs, the scale of conduct problems (SCP), the scale of hyperactivity-inclusion (HAS), the scale of peer Problems and scale for prosocial consumption (SPC). Items are marked on a Likert scale of 3 points which shows how each attribute relates to the answered (0=not real, 1=slightly real, 2=certainly true). An elevated PBS score represents power, while the high results in the other four SDQ sub-scales represent difficulties.
Total subscale results (except PBS) are summarized to create a total difficult score (TDS) for all subscales. Possible total scores range from 0 to 10 for subscales and from 0 to 40 for the TDS with variable cut-off scores to distinguish normal, borderline, and abnormal symptoms.
In order to evaluate the pattern of reactions and frequency of missing values in the information, a preliminary assessment of response levels was conducted at the item level. Participants who intentionally left a big portion of the questionnaires uncompleted and who discovered the same answer to each questionnaire item to be supported were deleted entirely from the database (with 0 per cent missing values) before evaluation. The data were screened for normality. For instance, skewness, kurtosis, and vodka tests, then descriptive statistics were requested. In order to describe the distributions of the respondents and the SDQ subscales and items, descriptive statistics including mean, standard variations and percentages were used. The inner consistency of the tool was evaluated by Cronbach’s Alpha (α).
For the SDQ subscales, the descriptive are tabulated. The internal consistency was calculated with a predetermined value, required for reliability. The SDQ subscales equal to α = 0.54, which denotes the lowest peer relationship. Other subscales were Problem (α =0.63), Emotional Symptoms (α =0.67), Prosocial Behavior (α =0.65) and Hyperactivity (α =0.76). The internal consistency for the SDQ is α = 0.75. Table 1 represents the values of, Cronbach‘s alphas value, Standard Deviation, acceptable, Details of Mean and Skewness, Kurtosis.
Table 1
“Means, Standard Deviations, Skewness, Kurtosis, and Internal Consistency (α) Scores for SDQ Subscales.”
Scale |
Mean |
Standard Deviation |
Skewness |
Kurtosis |
Cronbach (α) |
“Conduct Problems” |
6.47 |
1.70 |
1.56 |
2.86 |
0.63 |
“Emotional Symptoms” |
6.84 |
1.98 |
1.32 |
1.61 |
0.67 |
“Prosocial Behaviour” |
13.83 |
1.58 |
-1.81 |
4.14 |
0.65 |
“Hyperactivity” |
8.20 |
2.61 |
0.73 |
-0.20 |
0.76 |
“Peer Relationships” |
6.38 |
1.62 |
1.61 |
3.04 |
0.54 |
In this examination, information was broke down utilized by EFA (Exploratory factor investigation). In this examination, KMO and Bartlett tests were done. The Kaiser-Meyer-Olkin (KMO) test shows how information is suitable for factor analysis. The experiment measures the sufficiency of sampling for each model variable and the full model. The figure is a measure of the percentage of variances between factors that can be prevalent for KMO returns between 0 and 1. Thumb rule for statistical interpretations are KMO values between 0.8 and 1 indicate the sampling is adequate; KMO values less than 0.6 indicate the sampling is not adequate and that remedial action should be taken and KMO Values close to zero means that there are large partial correlations compared to the sum of correlations. In other words, there are widespread correlations which are a large problem for factor analysis. Variance (“Kaiser-Meyer-Olkin (KMO) Test for Sampling Adequacy – Statistics How To”, 2016). Bartlett’s test of sphericity tests the hypothesis that the correlation matrix is an identity matrix, which would indicate that the variables are unrelated and therefore unsuitable for structure detection. Small values (less than 0.05) of the significance level indicate that factor analysis may be useful with the data (“IBM Knowledge Center”, 2016). The Keiser Meyer Olkin (KMO) is at 0.9 which is justified and Bartlett’s Test of Sphericity demonstrates p<0.05.
Table 2 denotes the structure matrix table.
Table 2
“Structure Matrix Table”
Factors |
SDQ Items |
Factor Loading |
Conduct Problems |
5 5 10 13 21 |
.523 .511 .523 .581 .400 |
Emotional Symptoms |
4 9 11 13 22 |
.374 .631 .581 .580 .631 |
Prosocial Behaviour |
1 3 6 16 21 |
.564 .480 .587 .523 .565 |
Hyperactivity |
3 9 12 20 22 |
-.621 -.610 -.744 -.575 -.671 |
Peer Relationships |
6 10 13 18 21 |
.463 .465 .612 .480 .423 |
Table 3 displays the factor correlation matrix after loading the factors used in table 2
Factor Correlation Matrix Table 3 |
|||||
Factor |
1 |
2 |
3 |
4 |
5 |
1 |
1.000 |
.250 |
-.271 |
-.443 |
.311 |
2 |
.251 |
1.000 |
-.106 |
-.362 |
.468 |
3 |
-.271 |
-.108 |
1.000 |
.327 |
-.253 |
4 |
-.443 |
-.363 |
.328 |
1.000 |
-.293 |
5 |
.311 |
.467 |
-.253 |
-.293 |
1.000 |
The second EFA uses a scree plot. A scree plot is a line plot of eigenvalues ??of factors or major components of analysis. The Scree plot is used to determine the number of factors to be retained in exploratory factor analysis (FA) or principal component to maintain a principal component analysis (PCA). The procedure for finding statistically significant factors or components using a scree plot is also known as Scree test. A Scree plot always shows the eigenvalues ??in a downward curve and ordering the eigenvalues ??from largest to smallest. According to the scree plot, the “elbow” of the graph where the eigenvalues seem to level off is found and factors or components to the left of this point should be retained as significant. The Kaiser Guttman administering was utilized to take a gander at the scree plot. Scree plot has to bend an elbow at the fifth drawn line of the 5 factors. The EFA (Exploratory factor investigation) additionally has shown that there are 5 factors. Among 5 factors, factor 1 (Conduct issue) had the least Eigenvalue and aggregate was 23.16% though fifth factor (Peer relationship) had most astounding worth where add up to fluctuation was 47.68%.
Although the SDQ was used in selected research from Nigeria to explore behavioural issues among adolescents (Adeosun, Ogun, Adegbohun, Jejeloye & Ogunlowo, 2014; Adeosun et al., 2015; Akpa & Bamgboye, 2015; Bakare, Ubochi, Ebigbo & Orovwigho, 2010), this research is, to the best of our understanding, a thorough effort to report the SDQ factor structure in this report (Akpa & Unuabonah, 2011; Akpa, Bamgboye & Baiyewu, 2015). An additional milestone in what could be reported in several significant SDQ research is the incorporation of CFA into this research (Heubeck & Neill, 2000). Nonetheless, the research is subject to some significant reporting limitations. In order to determine children’s mental health, for example, it was hard to get data on Nigerians. The linguistic barrier is the main problem, apart from access to initial information. The secondary information is incorrect. It is very hard for respondents to comprehend the questions set out in English and answer them. The group aged 4 to 7 years of age were not able to comprehend and answer any questions.
There was also a lack of collaboration that made it hard to communicate with them. The complexity of reporting the correct outcomes has been improved. Future suggestions include the avoidance of secondary information and therefore strongly recommended initial information should be as precise as possible. On the other side, an efficient instrument must remove the language barrier. Parents should be supported in overcoming problems of collaboration and comprehension among children between the ages of 4 and 7.
This research is the first in Nigeria to provide information on factor structure and psychometric characteristics of the self-reported SDQ variant. The SDQ’s 5-factor theoretical model does not match the information acquired from the current research; a 3-factor correlated model better matches the information. No one of the initial SDQ subscales is uniform in the current research, except for prosocial behaviour.
The findings indicate that the products on the SDQ may not fit the renowned five components of its metrology model in the current environments. Consequently, it is suggested that caution is applied in this context to the use of the initial 5-factor model SDQ. However, additional major analytical factor studies are required to correctly detect an alternative structure that would lead to a redeployment of products to other subscales better describing the teenagers’ circumstances in this region (Mellor & Stokes, 2007).
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